/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.naming.resources;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.zip.ZipEntry;
import java.util.zip.ZipException;
import java.util.zip.ZipFile;

import javax.naming.CompositeName;
import javax.naming.Name;
import javax.naming.NameAlreadyBoundException;
import javax.naming.NameNotFoundException;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.NotContextException;
import javax.naming.OperationNotSupportedException;
import javax.naming.directory.AttributeModificationException;
import javax.naming.directory.Attributes;
import javax.naming.directory.DirContext;
import javax.naming.directory.InvalidAttributesException;
import javax.naming.directory.InvalidSearchControlsException;
import javax.naming.directory.InvalidSearchFilterException;
import javax.naming.directory.ModificationItem;
import javax.naming.directory.SearchControls;

import org.apache.naming.NamingContextBindingsEnumeration;
import org.apache.naming.NamingContextEnumeration;
import org.apache.naming.NamingEntry;

/**
 * WAR Directory Context implementation.
 * 
 * @author Remy Maucherat
 * @version $Revision: 467222 $ $Date: 2006-10-24 11:17:11 +0800 (星期二, 24 十月
 *          2006) $
 */

public class WARDirContext extends BaseDirContext {

	private static org.apache.juli.logging.Log log = org.apache.juli.logging.LogFactory
			.getLog(WARDirContext.class);

	// ----------------------------------------------------------- Constructors

	/**
	 * Builds a WAR directory context using the given environment.
	 */
	public WARDirContext() {
		super();
	}

	/**
	 * Builds a WAR directory context using the given environment.
	 */
	public WARDirContext(Hashtable env) {
		super(env);
	}

	/**
	 * Constructor used for returning fake subcontexts.
	 */
	protected WARDirContext(ZipFile base, Entry entries) {
		this.base = base;
		this.entries = entries;
	}

	// ----------------------------------------------------- Instance Variables

	/**
	 * The WAR file.
	 */
	protected ZipFile base = null;

	/**
	 * WAR entries.
	 */
	protected Entry entries = null;

	// ------------------------------------------------------------- Properties

	/**
	 * Set the document root.
	 * 
	 * @param docBase
	 *            The new document root
	 * 
	 * @exception IllegalArgumentException
	 *                if the specified value is not supported by this
	 *                implementation
	 * @exception IllegalArgumentException
	 *                if this would create a malformed URL
	 */
	public void setDocBase(String docBase) {

		// Validate the format of the proposed document root
		if (docBase == null)
			throw new IllegalArgumentException(sm.getString("resources.null"));
		if (!(docBase.endsWith(".war")))
			throw new IllegalArgumentException(sm
					.getString("warResources.notWar"));

		// Calculate a File object referencing this document base directory
		File base = new File(docBase);

		// Validate that the document base is an existing directory
		if (!base.exists() || !base.canRead() || base.isDirectory())
			throw new IllegalArgumentException(sm.getString(
					"warResources.invalidWar", docBase));
		try {
			this.base = new ZipFile(base);
		} catch (Exception e) {
			throw new IllegalArgumentException(sm.getString(
					"warResources.invalidWar", e.getMessage()));
		}
		super.setDocBase(docBase);

		loadEntries();

	}

	// --------------------------------------------------------- Public Methods

	/**
	 * Release any resources allocated for this directory context.
	 */
	public void release() {

		entries = null;
		if (base != null) {
			try {
				base.close();
			} catch (IOException e) {
				log.warn("Exception closing WAR File " + base.getName(), e);
			}
		}
		base = null;
		super.release();

	}

	// -------------------------------------------------------- Context Methods

	/**
	 * Retrieves the named object.
	 * 
	 * @param name
	 *            the name of the object to look up
	 * @return the object bound to name
	 * @exception NamingException
	 *                if a naming exception is encountered
	 */
	public Object lookup(String name) throws NamingException {
		return lookup(new CompositeName(name));
	}

	/**
	 * Retrieves the named object. If name is empty, returns a new instance of
	 * this context (which represents the same naming context as this context,
	 * but its environment may be modified independently and it may be accessed
	 * concurrently).
	 * 
	 * @param name
	 *            the name of the object to look up
	 * @return the object bound to name
	 * @exception NamingException
	 *                if a naming exception is encountered
	 */
	public Object lookup(Name name) throws NamingException {
		if (name.isEmpty())
			return this;
		Entry entry = treeLookup(name);
		if (entry == null)
			throw new NamingException(sm.getString("resources.notFound", name));
		ZipEntry zipEntry = entry.getEntry();
		if (zipEntry.isDirectory())
			return new WARDirContext(base, entry);
		else
			return new WARResource(entry.getEntry());
	}

	/**
	 * Unbinds the named object. Removes the terminal atomic name in name from
	 * the target context--that named by all but the terminal atomic part of
	 * name.
	 * <p>
	 * This method is idempotent. It succeeds even if the terminal atomic name
	 * is not bound in the target context, but throws NameNotFoundException if
	 * any of the intermediate contexts do not exist.
	 * 
	 * @param name
	 *            the name to bind; may not be empty
	 * @exception NameNotFoundException
	 *                if an intermediate context does not exist
	 * @exception NamingException
	 *                if a naming exception is encountered
	 */
	public void unbind(String name) throws NamingException {
		throw new OperationNotSupportedException();
	}

	/**
	 * Binds a new name to the object bound to an old name, and unbinds the old
	 * name. Both names are relative to this context. Any attributes associated
	 * with the old name become associated with the new name. Intermediate
	 * contexts of the old name are not changed.
	 * 
	 * @param oldName
	 *            the name of the existing binding; may not be empty
	 * @param newName
	 *            the name of the new binding; may not be empty
	 * @exception NameAlreadyBoundException
	 *                if newName is already bound
	 * @exception NamingException
	 *                if a naming exception is encountered
	 */
	public void rename(String oldName, String newName) throws NamingException {
		throw new OperationNotSupportedException();
	}

	/**
	 * Enumerates the names bound in the named context, along with the class
	 * names of objects bound to them. The contents of any subcontexts are not
	 * included.
	 * <p>
	 * If a binding is added to or removed from this context, its effect on an
	 * enumeration previously returned is undefined.
	 * 
	 * @param name
	 *            the name of the context to list
	 * @return an enumeration of the names and class names of the bindings in
	 *         this context. Each element of the enumeration is of type
	 *         NameClassPair.
	 * @exception NamingException
	 *                if a naming exception is encountered
	 */
	public NamingEnumeration list(String name) throws NamingException {
		return list(new CompositeName(name));
	}

	/**
	 * Enumerates the names bound in the named context, along with the class
	 * names of objects bound to them. The contents of any subcontexts are not
	 * included.
	 * <p>
	 * If a binding is added to or removed from this context, its effect on an
	 * enumeration previously returned is undefined.
	 * 
	 * @param name
	 *            the name of the context to list
	 * @return an enumeration of the names and class names of the bindings in
	 *         this context. Each element of the enumeration is of type
	 *         NameClassPair.
	 * @exception NamingException
	 *                if a naming exception is encountered
	 */
	public NamingEnumeration list(Name name) throws NamingException {
		if (name.isEmpty())
			return new NamingContextEnumeration(list(entries).iterator());
		Entry entry = treeLookup(name);
		if (entry == null)
			throw new NamingException(sm.getString("resources.notFound", name));
		return new NamingContextEnumeration(list(entry).iterator());
	}

	/**
	 * Enumerates the names bound in the named context, along with the objects
	 * bound to them. The contents of any subcontexts are not included.
	 * <p>
	 * If a binding is added to or removed from this context, its effect on an
	 * enumeration previously returned is undefined.
	 * 
	 * @param name
	 *            the name of the context to list
	 * @return an enumeration of the bindings in this context. Each element of
	 *         the enumeration is of type Binding.
	 * @exception NamingException
	 *                if a naming exception is encountered
	 */
	public NamingEnumeration listBindings(String name) throws NamingException {
		return listBindings(new CompositeName(name));
	}

	/**
	 * Enumerates the names bound in the named context, along with the objects
	 * bound to them. The contents of any subcontexts are not included.
	 * <p>
	 * If a binding is added to or removed from this context, its effect on an
	 * enumeration previously returned is undefined.
	 * 
	 * @param name
	 *            the name of the context to list
	 * @return an enumeration of the bindings in this context. Each element of
	 *         the enumeration is of type Binding.
	 * @exception NamingException
	 *                if a naming exception is encountered
	 */
	public NamingEnumeration listBindings(Name name) throws NamingException {
		if (name.isEmpty())
			return new NamingContextBindingsEnumeration(list(entries)
					.iterator(), this);
		Entry entry = treeLookup(name);
		if (entry == null)
			throw new NamingException(sm.getString("resources.notFound", name));
		return new NamingContextBindingsEnumeration(list(entry).iterator(),
				this);
	}

	/**
	 * Destroys the named context and removes it from the namespace. Any
	 * attributes associated with the name are also removed. Intermediate
	 * contexts are not destroyed.
	 * <p>
	 * This method is idempotent. It succeeds even if the terminal atomic name
	 * is not bound in the target context, but throws NameNotFoundException if
	 * any of the intermediate contexts do not exist.
	 * 
	 * In a federated naming system, a context from one naming system may be
	 * bound to a name in another. One can subsequently look up and perform
	 * operations on the foreign context using a composite name. However, an
	 * attempt destroy the context using this composite name will fail with
	 * NotContextException, because the foreign context is not a "subcontext" of
	 * the context in which it is bound. Instead, use unbind() to remove the
	 * binding of the foreign context. Destroying the foreign context requires
	 * that the destroySubcontext() be performed on a context from the foreign
	 * context's "native" naming system.
	 * 
	 * @param name
	 *            the name of the context to be destroyed; may not be empty
	 * @exception NameNotFoundException
	 *                if an intermediate context does not exist
	 * @exception NotContextException
	 *                if the name is bound but does not name a context, or does
	 *                not name a context of the appropriate type
	 */
	public void destroySubcontext(String name) throws NamingException {
		throw new OperationNotSupportedException();
	}

	/**
	 * Retrieves the named object, following links except for the terminal
	 * atomic component of the name. If the object bound to name is not a link,
	 * returns the object itself.
	 * 
	 * @param name
	 *            the name of the object to look up
	 * @return the object bound to name, not following the terminal link (if
	 *         any).
	 * @exception NamingException
	 *                if a naming exception is encountered
	 */
	public Object lookupLink(String name) throws NamingException {
		// Note : Links are not supported
		return lookup(name);
	}

	/**
	 * Retrieves the full name of this context within its own namespace.
	 * <p>
	 * Many naming services have a notion of a "full name" for objects in their
	 * respective namespaces. For example, an LDAP entry has a distinguished
	 * name, and a DNS record has a fully qualified name. This method allows the
	 * client application to retrieve this name. The string returned by this
	 * method is not a JNDI composite name and should not be passed directly to
	 * context methods. In naming systems for which the notion of full name does
	 * not make sense, OperationNotSupportedException is thrown.
	 * 
	 * @return this context's name in its own namespace; never null
	 * @exception OperationNotSupportedException
	 *                if the naming system does not have the notion of a full
	 *                name
	 * @exception NamingException
	 *                if a naming exception is encountered
	 */
	public String getNameInNamespace() throws NamingException {
		return docBase;
	}

	// ----------------------------------------------------- DirContext Methods

	/**
	 * Retrieves selected attributes associated with a named object. See the
	 * class description regarding attribute models, attribute type names, and
	 * operational attributes.
	 * 
	 * @return the requested attributes; never null
	 * @param name
	 *            the name of the object from which to retrieve attributes
	 * @param attrIds
	 *            the identifiers of the attributes to retrieve. null indicates
	 *            that all attributes should be retrieved; an empty array
	 *            indicates that none should be retrieved
	 * @exception NamingException
	 *                if a naming exception is encountered
	 */
	public Attributes getAttributes(String name, String[] attrIds)
			throws NamingException {
		return getAttributes(new CompositeName(name), attrIds);
	}

	/**
	 * Retrieves all of the attributes associated with a named object.
	 * 
	 * @return the set of attributes associated with name. Returns an empty
	 *         attribute set if name has no attributes; never null.
	 * @param name
	 *            the name of the object from which to retrieve attributes
	 * @exception NamingException
	 *                if a naming exception is encountered
	 */
	public Attributes getAttributes(Name name, String[] attrIds)
			throws NamingException {

		Entry entry = null;
		if (name.isEmpty())
			entry = entries;
		else
			entry = treeLookup(name);
		if (entry == null)
			throw new NamingException(sm.getString("resources.notFound", name));

		ZipEntry zipEntry = entry.getEntry();

		ResourceAttributes attrs = new ResourceAttributes();
		attrs.setCreationDate(new Date(zipEntry.getTime()));
		attrs.setName(entry.getName());
		if (!zipEntry.isDirectory())
			attrs.setResourceType("");
		attrs.setContentLength(zipEntry.getSize());
		attrs.setLastModified(zipEntry.getTime());

		return attrs;

	}

	/**
	 * Modifies the attributes associated with a named object. The order of the
	 * modifications is not specified. Where possible, the modifications are
	 * performed atomically.
	 * 
	 * @param name
	 *            the name of the object whose attributes will be updated
	 * @param mod_op
	 *            the modification operation, one of: ADD_ATTRIBUTE,
	 *            REPLACE_ATTRIBUTE, REMOVE_ATTRIBUTE
	 * @param attrs
	 *            the attributes to be used for the modification; may not be
	 *            null
	 * @exception AttributeModificationException
	 *                if the modification cannot be completed successfully
	 * @exception NamingException
	 *                if a naming exception is encountered
	 */
	public void modifyAttributes(String name, int mod_op, Attributes attrs)
			throws NamingException {
		throw new OperationNotSupportedException();
	}

	/**
	 * Modifies the attributes associated with a named object using an an
	 * ordered list of modifications. The modifications are performed in the
	 * order specified. Each modification specifies a modification operation
	 * code and an attribute on which to operate. Where possible, the
	 * modifications are performed atomically.
	 * 
	 * @param name
	 *            the name of the object whose attributes will be updated
	 * @param mods
	 *            an ordered sequence of modifications to be performed; may not
	 *            be null
	 * @exception AttributeModificationException
	 *                if the modification cannot be completed successfully
	 * @exception NamingException
	 *                if a naming exception is encountered
	 */
	public void modifyAttributes(String name, ModificationItem[] mods)
			throws NamingException {
		throw new OperationNotSupportedException();
	}

	/**
	 * Binds a name to an object, along with associated attributes. If attrs is
	 * null, the resulting binding will have the attributes associated with obj
	 * if obj is a DirContext, and no attributes otherwise. If attrs is
	 * non-null, the resulting binding will have attrs as its attributes; any
	 * attributes associated with obj are ignored.
	 * 
	 * @param name
	 *            the name to bind; may not be empty
	 * @param obj
	 *            the object to bind; possibly null
	 * @param attrs
	 *            the attributes to associate with the binding
	 * @exception NameAlreadyBoundException
	 *                if name is already bound
	 * @exception InvalidAttributesException
	 *                if some "mandatory" attributes of the binding are not
	 *                supplied
	 * @exception NamingException
	 *                if a naming exception is encountered
	 */
	public void bind(String name, Object obj, Attributes attrs)
			throws NamingException {
		throw new OperationNotSupportedException();
	}

	/**
	 * Binds a name to an object, along with associated attributes, overwriting
	 * any existing binding. If attrs is null and obj is a DirContext, the
	 * attributes from obj are used. If attrs is null and obj is not a
	 * DirContext, any existing attributes associated with the object already
	 * bound in the directory remain unchanged. If attrs is non-null, any
	 * existing attributes associated with the object already bound in the
	 * directory are removed and attrs is associated with the named object. If
	 * obj is a DirContext and attrs is non-null, the attributes of obj are
	 * ignored.
	 * 
	 * @param name
	 *            the name to bind; may not be empty
	 * @param obj
	 *            the object to bind; possibly null
	 * @param attrs
	 *            the attributes to associate with the binding
	 * @exception InvalidAttributesException
	 *                if some "mandatory" attributes of the binding are not
	 *                supplied
	 * @exception NamingException
	 *                if a naming exception is encountered
	 */
	public void rebind(String name, Object obj, Attributes attrs)
			throws NamingException {
		throw new OperationNotSupportedException();
	}

	/**
	 * Creates and binds a new context, along with associated attributes. This
	 * method creates a new subcontext with the given name, binds it in the
	 * target context (that named by all but terminal atomic component of the
	 * name), and associates the supplied attributes with the newly created
	 * object. All intermediate and target contexts must already exist. If attrs
	 * is null, this method is equivalent to Context.createSubcontext().
	 * 
	 * @param name
	 *            the name of the context to create; may not be empty
	 * @param attrs
	 *            the attributes to associate with the newly created context
	 * @return the newly created context
	 * @exception NameAlreadyBoundException
	 *                if the name is already bound
	 * @exception InvalidAttributesException
	 *                if attrs does not contain all the mandatory attributes
	 *                required for creation
	 * @exception NamingException
	 *                if a naming exception is encountered
	 */
	public DirContext createSubcontext(String name, Attributes attrs)
			throws NamingException {
		throw new OperationNotSupportedException();
	}

	/**
	 * Retrieves the schema associated with the named object. The schema
	 * describes rules regarding the structure of the namespace and the
	 * attributes stored within it. The schema specifies what types of objects
	 * can be added to the directory and where they can be added; what mandatory
	 * and optional attributes an object can have. The range of support for
	 * schemas is directory-specific.
	 * 
	 * @param name
	 *            the name of the object whose schema is to be retrieved
	 * @return the schema associated with the context; never null
	 * @exception OperationNotSupportedException
	 *                if schema not supported
	 * @exception NamingException
	 *                if a naming exception is encountered
	 */
	public DirContext getSchema(String name) throws NamingException {
		throw new OperationNotSupportedException();
	}

	/**
	 * Retrieves a context containing the schema objects of the named object's
	 * class definitions.
	 * 
	 * @param name
	 *            the name of the object whose object class definition is to be
	 *            retrieved
	 * @return the DirContext containing the named object's class definitions;
	 *         never null
	 * @exception OperationNotSupportedException
	 *                if schema not supported
	 * @exception NamingException
	 *                if a naming exception is encountered
	 */
	public DirContext getSchemaClassDefinition(String name)
			throws NamingException {
		throw new OperationNotSupportedException();
	}

	/**
	 * Searches in a single context for objects that contain a specified set of
	 * attributes, and retrieves selected attributes. The search is performed
	 * using the default SearchControls settings.
	 * 
	 * @param name
	 *            the name of the context to search
	 * @param matchingAttributes
	 *            the attributes to search for. If empty or null, all objects in
	 *            the target context are returned.
	 * @param attributesToReturn
	 *            the attributes to return. null indicates that all attributes
	 *            are to be returned; an empty array indicates that none are to
	 *            be returned.
	 * @return a non-null enumeration of SearchResult objects. Each SearchResult
	 *         contains the attributes identified by attributesToReturn and the
	 *         name of the corresponding object, named relative to the context
	 *         named by name.
	 * @exception NamingException
	 *                if a naming exception is encountered
	 */
	public NamingEnumeration search(String name, Attributes matchingAttributes,
			String[] attributesToReturn) throws NamingException {
		throw new OperationNotSupportedException();
	}

	/**
	 * Searches in a single context for objects that contain a specified set of
	 * attributes. This method returns all the attributes of such objects. It is
	 * equivalent to supplying null as the atributesToReturn parameter to the
	 * method search(Name, Attributes, String[]).
	 * 
	 * @param name
	 *            the name of the context to search
	 * @param matchingAttributes
	 *            the attributes to search for. If empty or null, all objects in
	 *            the target context are returned.
	 * @return a non-null enumeration of SearchResult objects. Each SearchResult
	 *         contains the attributes identified by attributesToReturn and the
	 *         name of the corresponding object, named relative to the context
	 *         named by name.
	 * @exception NamingException
	 *                if a naming exception is encountered
	 */
	public NamingEnumeration search(String name, Attributes matchingAttributes)
			throws NamingException {
		throw new OperationNotSupportedException();
	}

	/**
	 * Searches in the named context or object for entries that satisfy the
	 * given search filter. Performs the search as specified by the search
	 * controls.
	 * 
	 * @param name
	 *            the name of the context or object to search
	 * @param filter
	 *            the filter expression to use for the search; may not be null
	 * @param cons
	 *            the search controls that control the search. If null, the
	 *            default search controls are used (equivalent to (new
	 *            SearchControls())).
	 * @return an enumeration of SearchResults of the objects that satisfy the
	 *         filter; never null
	 * @exception InvalidSearchFilterException
	 *                if the search filter specified is not supported or
	 *                understood by the underlying directory
	 * @exception InvalidSearchControlsException
	 *                if the search controls contain invalid settings
	 * @exception NamingException
	 *                if a naming exception is encountered
	 */
	public NamingEnumeration search(String name, String filter,
			SearchControls cons) throws NamingException {
		throw new OperationNotSupportedException();
	}

	/**
	 * Searches in the named context or object for entries that satisfy the
	 * given search filter. Performs the search as specified by the search
	 * controls.
	 * 
	 * @param name
	 *            the name of the context or object to search
	 * @param filterExpr
	 *            the filter expression to use for the search. The expression
	 *            may contain variables of the form "{i}" where i is a
	 *            nonnegative integer. May not be null.
	 * @param filterArgs
	 *            the array of arguments to substitute for the variables in
	 *            filterExpr. The value of filterArgs[i] will replace each
	 *            occurrence of "{i}". If null, equivalent to an empty array.
	 * @param cons
	 *            the search controls that control the search. If null, the
	 *            default search controls are used (equivalent to (new
	 *            SearchControls())).
	 * @return an enumeration of SearchResults of the objects that satisy the
	 *         filter; never null
	 * @exception ArrayIndexOutOfBoundsException
	 *                if filterExpr contains {i} expressions where i is outside
	 *                the bounds of the array filterArgs
	 * @exception InvalidSearchControlsException
	 *                if cons contains invalid settings
	 * @exception InvalidSearchFilterException
	 *                if filterExpr with filterArgs represents an invalid search
	 *                filter
	 * @exception NamingException
	 *                if a naming exception is encountered
	 */
	public NamingEnumeration search(String name, String filterExpr,
			Object[] filterArgs, SearchControls cons) throws NamingException {
		throw new OperationNotSupportedException();
	}

	// ------------------------------------------------------ Protected Methods

	/**
	 * Normalize the name of an entry read from the Zip.
	 */
	protected String normalize(ZipEntry entry) {

		String result = "/" + entry.getName();
		if (entry.isDirectory()) {
			result = result.substring(0, result.length() - 1);
		}
		return result;

	}

	/**
	 * Constructs a tree of the entries contained in a WAR file.
	 */
	protected void loadEntries() {

		try {

			Enumeration entryList = base.entries();
			entries = new Entry("/", new ZipEntry("/"));

			while (entryList.hasMoreElements()) {

				ZipEntry entry = (ZipEntry) entryList.nextElement();
				String name = normalize(entry);
				int pos = name.lastIndexOf('/');
				// Check that parent entries exist and, if not, create them.
				// This fixes a bug for war files that don't record separate
				// zip entries for the directories.
				int currentPos = -1;
				int lastPos = 0;
				while ((currentPos = name.indexOf('/', lastPos)) != -1) {
					Name parentName = new CompositeName(name.substring(0,
							lastPos));
					Name childName = new CompositeName(name.substring(0,
							currentPos));
					String entryName = name.substring(lastPos, currentPos);
					// Parent should have been created in last cycle through
					// this loop
					Entry parent = treeLookup(parentName);
					Entry child = treeLookup(childName);
					if (child == null) {
						// Create a new entry for missing entry and strip off
						// the leading '/' character and appended on by the
						// normalize method and add '/' character to end to
						// signify that it is a directory entry
						String zipName = name.substring(1, currentPos) + "/";
						child = new Entry(entryName, new ZipEntry(zipName));
						if (parent != null)
							parent.addChild(child);
					}
					// Increment lastPos
					lastPos = currentPos + 1;
				}
				String entryName = name.substring(pos + 1, name.length());
				Name compositeName = new CompositeName(name.substring(0, pos));
				Entry parent = treeLookup(compositeName);
				Entry child = new Entry(entryName, entry);
				if (parent != null)
					parent.addChild(child);

			}

		} catch (Exception e) {
		}

	}

	/**
	 * Entry tree lookup.
	 */
	protected Entry treeLookup(Name name) {
		if (name.isEmpty())
			return entries;
		Entry currentEntry = entries;
		for (int i = 0; i < name.size(); i++) {
			if (name.get(i).length() == 0)
				continue;
			currentEntry = currentEntry.getChild(name.get(i));
			if (currentEntry == null)
				return null;
		}
		return currentEntry;
	}

	/**
	 * List children as objects.
	 */
	protected ArrayList list(Entry entry) {

		ArrayList entries = new ArrayList();
		Entry[] children = entry.getChildren();
		Arrays.sort(children);
		NamingEntry namingEntry = null;

		for (int i = 0; i < children.length; i++) {
			ZipEntry current = children[i].getEntry();
			Object object = null;
			if (current.isDirectory()) {
				object = new WARDirContext(base, children[i]);
			} else {
				object = new WARResource(current);
			}
			namingEntry = new NamingEntry(children[i].getName(), object,
					NamingEntry.ENTRY);
			entries.add(namingEntry);
		}

		return entries;

	}

	// ---------------------------------------------------- Entries Inner Class

	/**
	 * Entries structure.
	 */
	protected class Entry implements Comparable {

		// -------------------------------------------------------- Constructor

		public Entry(String name, ZipEntry entry) {
			this.name = name;
			this.entry = entry;
		}

		// --------------------------------------------------- Member Variables

		protected String name = null;

		protected ZipEntry entry = null;

		protected Entry children[] = new Entry[0];

		// ----------------------------------------------------- Public Methods

		public int compareTo(Object o) {
			if (!(o instanceof Entry))
				return (+1);
			return (name.compareTo(((Entry) o).getName()));
		}

		public ZipEntry getEntry() {
			return entry;
		}

		public String getName() {
			return name;
		}

		public void addChild(Entry entry) {
			Entry[] newChildren = new Entry[children.length + 1];
			for (int i = 0; i < children.length; i++)
				newChildren[i] = children[i];
			newChildren[children.length] = entry;
			children = newChildren;
		}

		public Entry[] getChildren() {
			return children;
		}

		public Entry getChild(String name) {
			for (int i = 0; i < children.length; i++) {
				if (children[i].name.equals(name)) {
					return children[i];
				}
			}
			return null;
		}

	}

	// ------------------------------------------------ WARResource Inner Class

	/**
	 * This specialized resource implementation avoids opening the IputStream to
	 * the WAR right away.
	 */
	protected class WARResource extends Resource {

		// -------------------------------------------------------- Constructor

		public WARResource(ZipEntry entry) {
			this.entry = entry;
		}

		// --------------------------------------------------- Member Variables

		protected ZipEntry entry;

		// ----------------------------------------------------- Public Methods

		/**
		 * Content accessor.
		 * 
		 * @return InputStream
		 */
		public InputStream streamContent() throws IOException {
			try {
				if (binaryContent == null) {
					inputStream = base.getInputStream(entry);
				}
			} catch (ZipException e) {
				throw new IOException(e.getMessage());
			}
			return super.streamContent();
		}

	}

}
